Finding the Third Proportional to 72,621 and 100,003.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,621 : 100,003.50 = 100,003.50 : x
2. Step 2: Convert to fraction form
   72,621/100,003.50 = 100,003.50/x
3. Step 3: Cross multiply
   72,621x = 100,003.50 × 100,003.50
4. Step 4: Simplify right side
   72,621x = 10,000,700,012.25
5. Step 5: Solve for x
   x = 10,000,700,012.25/72,621
6. Step 6: Final answer
   x = 137,710.86